Hot-air furnace



sep. ze, 1925, V ,ss5,3s7

R. P. COSTELLO fio'' AIR FURNAcE Filed June 30, 1923 3 Sheets-Sheet 1l,555,357 R. P. COSTELLO How AIR FuRNAc szp. 29,. v1925.

Filed June 50, 1923 l 3 Sheets-Sheet 2 BY m? Sept. 29, 1925. l,555,357

R. P. COSTELLO HOT AIR FuRNAcE .Fea'Jyme so, 192; :Sheets-sheet s 24'.The coal chute 21 is also kept cool or comparatively cool by means of anair inlet 29, adapted to permit cold air to enter the front of thefurnace and to permit it to contact with the bottom and side of thechute and to flow into the combustion chamber by a passage 16, therebyassisting combustion as well as providing an auxiliary air supply. l

30 is a sliding asli plate at the bottom of the fire place, and isadapted to be pulled out by means of a hooked poker or rod. A

shut-off for the hopper may also be used.

From the foregoing, it'will be seen that the essential features of myimproved furnace are the inclined grate suitably mounted between sidewalls, adapted to receive coal from a hopper swingingly mounted on the-outside of the furnace, thereby providing ready access to the fire forpurposes of poking ashes or clinkers downwards into the ash pit, afterwhich the sliding ash plate is pulled out by any suitable means, and theclinkers or otherwise removed. The hopper is then swung back into placeand securely locked with a suitable looking device.

The joints' between the hopper and the furnace casing are preferablymade airtight in any well-known manner. The feeding -of the coal fromthe hopper is gradual and downwards as the fire burns, the swinginghopper also enables the fire to be kindled very easily. The swinginghopper, in combination with the inclined grate, are, as will be notedfrom the foregoing, features of my invention.

As many changes could be made in the above construction and manyapparently widely difierent embodiments of my invention, within thescope of the claims, constructed without departing from the spirit orscope thereof, it is intended that all matter contained in theaccompanying specification and drawings shall be interpreted asillustrative and not in a limiting sense.

iVhat I claim as niy invention is:

1. In a hot air furnace of the character described, a furnace casingand, in combination, a hopper swingingly mounted on the outside of thecasing and communicating therethrough, a feed door for the hopper, afireplace provided with sloping grate bars, wall plates for thefireplace adapted, in combination with suitable upper and lower plates,to form a chute between the hopper and the fireplace, an air intake forthe combustion chamber, an adjustable hinged plate in the chute, aslidably operable ash plate for the fire place, and means for adjustingthe hinged plate to regulate the supply of coal for the fireplace.

2. A furnace of the character described, in combination with aVfirep'lace having sloping grate bars, and a slidable ash plate, a feedhopper hingedly mounted on the outside of the furnace casing andcommunicating therethrough, a supply chute between the fireplace and thehopper, a hinged plate adjustably mounted on the chute, means forraising and lowering the hinged plate to regulate the supply of fuel, avertical'baflle mounted adjacent the chute to deflect the heattherefrom, air intake means acting in combination with said baflie forcooling said chute.

8. In a device of the character described, the combination with thefurnace proper having a fireplace provided with a suitably arrangedgrate, of a swinging hopper on the furnace casing and communicating withthe furnace therethrough, a fuel feed chute between the hopper and thefire place, a plate operatively mounted on the chute, alever for raisingand lowering said plate, a vertical baflie deflecting heat from thechute, and air intake means adapted, in combination with said bafile forcooling said chute and completing combustion.

4. A hot air furnace of the character described having a casing, asubstantally centrally located fireplace having an Vinclined grate onone side thereof, an inclined coal chute inside the casng and atsubstantially the same inclination as vthe .grate, a coal hopper von theoutside of the casing leading into the chute, part of said chute beingmovable to restrict its outlet and lessen the thiclness of coal on thegrate in the fireplace.

5. A hot air furnace as claimed in claim 4 having ash plates at thebottom of the grate.

6. A hot air furnace as claimed in claim 4, having the fireplaceconstructed with its ends and sides formed of the inner shell, an ashplate in the. bottom of the grate, and a baffie plate in the combustionchamber to protect the chute from direct action of the heatedcombustion.

7 A hot air furnace as claimed in claim 4, having the fire potconstructed with its ends and sides formed of the inner shell, an ashplate in the bottom of the grate, a baffle plate in the combustionchamber to protect the chute from direct action of the heatedcombustion, a pivoted plate on the upper side of the chute, and means toadjust the plate to control the thickness of fuel on the grate and inthe fire pot.

8. A hot air furnace as claimed in claim 4, having the fire potconstructed with its ends and sides formed of the inner shell, an ashplate in the bottom of the grate, a

baflle plate in the combustion Chamber to protect the chute froin directaction of the heated comloustion, a pivoted plate on the upper side ofthe chute, means to adjust 5 the plate to control the thickness of fuelon the grate and in the fire pot, an auxiliary draught danper With aduct leading around ROBERT PATRICK COSTELLO.

the chute and into the space above the upper dead plate of the ohute toaid in cooling the ooal fuel chute.

In Witness Whereof I have hereunto set my hand.

